| Rev |
Age |
Author |
Path |
Log message |
Diff |
| 2647 |
6003 d 10 h |
jermar |
/trunk/kernel/generic/src/mm/ |
Fix a bug in anonymous address space area sharing. Call the backend's share
function only if the source area is not already shared. Otherwise increment the
sh_info refcount. Without this fix, the kernel will try to recreate the pagemap
if three and more address space areas attempt to share the same data. |
|
| 2467 |
6189 d 11 h |
jermar |
/trunk/ |
Improve comments for arch-specific implementations of hierarchical
4-level page tables. Improve formatting. |
|
| 2141 |
6267 d 5 h |
jermar |
/trunk/ |
The Ultimate Solution To Illegal Virtual Aliases.
It is better to avoid them completely than to fight them.
Switch the sparc64 port to 16K pages. The TLBs and TSBs
continue to operate with 8K pages only. Page tables and
other generic parts operate with 16K pages.
Because the MMU doesn't support 16K directly, each 16K
page is emulated by a pair of 8K pages. With 16K pages,
illegal aliases cannot be created in 16K D-cache. |
|
| 2134 |
6268 d 9 h |
jermar |
/trunk/kernel/ |
Reworked handling of illegal virtual aliases caused by frame reuse.
We moved the incomplete handling from backend's frame method to
backend's page_fault method. The page_fault method is the one that
can create an illegal alias if it writes the userspace frame using
kernel address with a different page color than the page to which is
this frame mapped in userspace. When we detect this, we do D-cache
shootdown on all processors (!!!).
If we add code that accesses userspace memory from kernel address
space, we will have to check for illegal virtual aliases at all such
places.
I tested this on a 4-way simulated E6500 and a real-world Ultra 5,
which has unfortunatelly only one processor.
This solves ticket #26. |
|
| 2132 |
6269 d 16 h |
jermar |
/trunk/kernel/generic/src/mm/ |
Fix coding style in the address space area backends. |
|
| 2089 |
6325 d 15 h |
decky |
/trunk/ |
huge type system cleanup
remove cyclical type dependencies across multiple header files
many minor coding style fixes |
|
| 2076 |
6334 d 17 h |
jermar |
/trunk/kernel/ |
Beat the implicit illegal virtual alias created by reusing userspace frames.
In the anonymous and ELF backends, if the architecture has virtually indexed D-cache,
selectively flush cachelines belonging to the frame being freed.
This fixes Ticket #20. |
|
| 2071 |
6336 d 8 h |
jermar |
/trunk/ |
(c) versus (C) |
|
| 2000 |
6386 d 18 h |
decky |
/trunk/kernel/ |
move files to more proper locations |
|
| 1787 |
6526 d 10 h |
decky |
/ |
move kernel/trunk, uspace/trunk and boot/trunk to trunk/kernel, trunk/uspace and trunk/boot |
|
| 1780 |
6533 d 12 h |
jermar |
/kernel/trunk/ |
Replace old __u?? types with respective C99 variants (e.g. uint32_t, int64_t, uintptr_t etc.). |
|
| 1760 |
6544 d 13 h |
palkovsky |
/kernel/trunk/ |
Changed interface of frame_alloc/free to use address of frame instead of the pfn.
This makes it impossible to use >4GB of memory on 32-bit machines, but who cares... |
|
| 1757 |
6547 d 16 h |
jermar |
/kernel/trunk/ |
Cleanup of comments. |
|
| 1702 |
6554 d 14 h |
cejka |
/kernel/trunk/ |
Kernel doxygen comments updated. |
|
| 1550 |
6564 d 13 h |
jermar |
/kernel/trunk/generic/src/mm/ |
Remove left over piece of code for increasing reference count in ELF backend. |
|
| 1546 |
6564 d 14 h |
jermar |
/kernel/trunk/generic/src/mm/ |
Add reference to shared frames of ELF image backed address space area. |
|
| 1426 |
6571 d 7 h |
jermar |
/kernel/trunk/generic/src/mm/ |
Support for sharing address space areas backed up by ELF image. |
|
| 1425 |
6571 d 9 h |
jermar |
/kernel/trunk/generic/ |
Make address space backend data a union. |
|
| 1424 |
6571 d 11 h |
jermar |
/kernel/trunk/ |
Move the sharing functionality to address space area backends.
Add backend for continuous regions of physical memory.
Sharing for these areas works automagically now. |
|